20701055999 has 24 divisors (see below), whose sum is σ = 23633662752. Its totient is φ = 18019995840.

The previous prime is 20701055971. The next prime is 20701056011. The reversal of 20701055999 is 99955010702.

It is not a de Polignac number, because 20701055999 - 2²⁰ = 20700007423 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20701055939) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 467069 + ... + 509465.

It is an arithmetic number, because the mean of its divisors is an integer number (984735948).

Almost surely, 2^20701055999 is an apocalyptic number.

20701055999 is a deficient number, since it is larger than the sum of its proper divisors (2932606753).

20701055999 is a wasteful number, since it uses less digits than its factorization.

20701055999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42527 (or 42504 counting only the distinct ones).

The product of its (nonzero) digits is 255150, while the sum is 47.

The spelling of 20701055999 in words is "twenty billion, seven hundred one million, fifty-five thousand, nine hundred ninety-nine".